The three-hour telecast will feature six-time Grammy winner Underwood as Maria and “True Blood” star Stephen Moyer as Capt. Georg von Trapp with Tony Award winners Audra McDonald (Mother Abbess), Laura Benanti (Elsa Schrader) and Christian Borle (Max Dettweiler).

The young cast set to play the von Trapp children are Ariane Rinehart (Liesl), Michael Nigro (Fredrich), Ella Watts-Gorman (Louisa), Joe West (Kurt), Sophia Caruso (Brigitta), Grace Rundhaug (Marta) and Peyton Ella as young Gretl.

The live TV version of the Richard Rodgers and Oscar Hammerstein II musical is based on the original 1959 Broadway production of The Sound of Music, starring Mary Martin and Theodore Bikel, with a book by Howard Lindsay and Russel Crouse. The iconic story, according to NBC, "centers on a young woman who leaves an Austrian convent to become a governess to the seven children of a naval officer widower."

The Sound of Music Live! is executive-produced by Neil Meron and Craig Zadan. Beth McCarthy-Miller and Rob Ashford serve as co-directors.

The Sound of Music Live! is produced by Universal Television.

View the teaser below: